import java.util.Scanner;

public class work3212 {
    public static void main(String[] args) {
    System.out.println("*********************************");
    System.out.println("*****微型计算器               ****");
    System.out.println("*****1、求和                 ****");
    System.out.println("*****2、求差                 ****");
    System.out.println("*****3、求积                 ****");
    System.out.println("*****4、求商                 ****");
    System.out.println("*****5、求余                 ****");
    System.out.println("*****Q、退出                 ****");
    System.out.println("*****请选择您想执行的操作       ****");
    System.out.println("*********************************");

    System.out.println("请选择你所要执行的计算模式： ");
    Scanner sc = new Scanner(System.in);
    String number = sc.next();
    switch(number){
        case "1":
            System.out.println("请输入第一个数");
            double num1 = sc.nextDouble();
            System.out.println("请输入第二个数");
            double num2 = sc.nextDouble();
            System.out.println("求和结果为：" + (num1 + num2));
            break;
        case "2":
            System.out.println("请输入第一个数");
            double num3 = sc.nextDouble();
            System.out.println("请输入第二个数");
            double num4 = sc.nextDouble();
            System.out.println("求和结果为：" + (num3 - num4));
            break;
        case "3":
            System.out.println("请输入第一个数");
            double num5 = sc.nextDouble();
            System.out.println("请输入第二个数");
            double num6 = sc.nextDouble();
            System.out.println("求和结果为：" + (num5 * num6));
            break;
        case "4":
            System.out.println("请输入第一个数");
            double num7 = sc.nextDouble();
            System.out.println("请输入第二个数");
            double num8 = sc.nextDouble();
            System.out.println("求和结果为：" + (num7 / num8));
            break;
        case "5":
            System.out.println("请输入第一个数");
            double num9 = sc.nextDouble();
            System.out.println("请输入第二个数");
            double num10 = sc.nextDouble();
            System.out.println("求和结果为：" + (num9 % num10));
            break;
        case "Q":
            break;
    }
}
}

